BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOI→SAN

Boise, ID (BOI) to San Diego, CA (SAN) flight delay odds

81.3% of 1,039 official scheduled BOI-to-SAN flights arrived on time; 9.0% arrived at least 30 minutes late and 0.6% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
81.3%arrived on time
9.0%30+ min late
0.6%cancelled
1,039scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.9%all scheduled flights
120+ minutes late1.5%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+3.1 mincompleted flights

Which departure time was most reliable for BOI to SAN?

Among qualifying BOI-to-SAN departure window results, Early morning had the highest on-time rate: 90.9% of 439 flights. Evening was lowest at 73.2% across 343 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning43990.9%3.6%0.7%
Afternoon24077.1%8.8%0.0%
Evening34373.2%15.2%0.9%

Which weekday was most reliable for BOI to SAN?

Among qualifying BOI-to-SAN weekday results, Saturday had the highest on-time rate: 90.2% of 132 flights. Friday was lowest at 75.9% across 158 flights.

DayFlightsOn time30+ minCancelled
Monday16182.0%9.3%0.0%
Tuesday14377.6%9.8%0.0%
Wednesday13789.8%5.1%0.7%
Thursday16078.8%10.0%0.6%
Friday15875.9%11.4%1.9%
Saturday13290.2%3.8%0.8%
Sunday14877.0%12.2%0.0%

Which airline was most reliable for BOI to SAN?

Among qualifying BOI-to-SAN airline results, Alaska Airlines had the highest on-time rate: 88.2% of 263 flights. Southwest Airlines was lowest at 76.3% across 372 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines40481.4%10.1%0.5%
Southwest Airlines37276.3%10.8%0.3%
Alaska Airlines26388.2%4.6%1.1%

Which month was most reliable for BOI to SAN?

Among qualifying BOI-to-SAN month results, April 2026 had the highest on-time rate: 91.1% of 79 flights. January 2026 was lowest at 71.2% across 73 flights.

MonthFlightsOn time30+ minCancelled
July 20259186.8%7.7%0.0%
August 20258778.2%8.0%0.0%
September 20258680.2%8.1%2.3%
October 20259184.6%6.6%0.0%
November 20258979.8%10.1%1.1%
December 20259479.8%13.8%2.1%
January 20267371.2%16.4%0.0%
February 20267382.2%5.5%0.0%
March 20268983.1%11.2%1.1%
April 20267991.1%2.5%0.0%
May 202610182.2%5.9%0.0%
June 20268675.6%11.6%0.0%

What drove BOI to SAN delay minutes?

Late aircraft was the largest recorded BOI-to-SAN delay category, accounting for 43.8% of 9,115 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.7%
Late aircraft43.8%
National airspace29.0%
Weather2.4%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.